#!/bin/sh
# $FreeBSD: head/audio/virtual_oss/files/virtual_oss.in 559567 2020-12-29 11:46:46Z hselasky $
#
# PROVIDE: virtual_oss
# REQUIRE: kld
# BEFORE: LOGIN sndiod
# KEYWORD: shutdown

#
# Add the following lines to /etc/rc.conf.local, /etc/rc.conf or
# /etc/rc.conf.d/virtual_oss to enable this service:
#
# virtual_oss_enable (bool):    Set to NO by default.
#                               Set it to "YES" to enable virtual_oss.
# virtual_oss_configs (string): List of configurations to use
#                               Default is "dsp"
# virtual_oss_dsp (string):     Arguments passed to virtual_oss config named dsp
#                               Default is
#                                   -T /dev/sndstat # register vdsp in sndstat
#                                   -C 2 -c 2 # use two channels
#                                   -S # resample if needed
#                                   -i 8 # real-time priority
#                                   -r 48000 # sample rate
#                                   -b 24 # bit depth
#                                   -s 8.0ms # buffer delay
#                                   -f /dev/dsp0 # hardware device to use
#                                   -d dsp # vdev to create
#                                   -t dsp.ctl # control device

. /etc/rc.subr

name=virtual_oss
desc="Virtual OSS device manager"
rcvar=${name}_enable
start_precmd="${name}_precmd"
start_cmd="${name}_start"
stop_cmd="${name}_stop"
status_cmd="${name}_status"

# required_modules="cuse"
virtual_oss_default_args="\
  -T /dev/sndstat \
  -S \
  -i 8 \
  -C 2 -c 2 \
  -r 48000 \
  -b 24 \
  -s 8.0ms \
  -f /dev/dsp0 \
  -c 2 \
  -d dsp \
  -t dsp.ctl"
configs=

load_rc_config $name

: ${virtual_oss_enable:="NO"}
: ${virtual_oss_configs:="dsp"}
: ${virtual_oss_dsp:="$virtual_oss_default_args"}
: ${virtual_oss_delay:=1}

command=virtual_oss
command_args="-B"

pidpath="/var/run/${name}"

virtual_oss()
{
  # When running early we need to pre-load some libraries
  env LD_PRELOAD=%%LIBFFTW3%%%%LIBSAMPLERATE%% %%PREFIX%%/sbin/virtual_oss $*
}

virtual_oss_pids()
{
  pids=$(pgrep -d ' ' $name)
  pids=${pids% }
  printf "${pids}"
}

virtual_oss_precmd()
{
  /usr/bin/install -d -m 0755 -o root ${pidpath}
}

start_instance()
{
  config=$*
  instance_args=$(eval "echo \$virtual_oss_${config}")
  if [ -z "${instance_args}" ]; then
    echo "No such config ${config}"
  else
    echo -n "Starting Virtual OSS config ${config} ..."
    ${command} \
      ${command_args} \
      -D ${pidpath}/${config}.pid \
      ${instance_args}
    echo " done"
  fi
}

stop_instance()
{
  config=$*
  instance_args=`eval "echo \$virtual_oss_${config}"`
  if [ -z "${instance_args}" ]; then
    echo "No such config ${config}"
  elif [ -e "${pidpath}/${config}.pid" ]; then
    pid=`check_pidfile ${pidpath}/${config}.pid %%PREFIX%%/sbin/virtual_oss`
    if [ ! -z "${pid}" ]; then
      echo -n "Stopping Virtual OSS config ${config} ... "
      kill $pid
      rm -f ${pidpath}/${config}.pid
      echo "done"
    fi
  fi
}

virtual_oss_start()
{
  configs=$*
  [ -z "${configs}" ] && configs="${virtual_oss_configs}"
  for config in ${configs}; do
    start_instance $config
    sleep ${virtual_oss_delay}
  done
}

virtual_oss_stop()
{
  configs=$*
  [ -z "${configs}" ] && configs="${virtual_oss_configs}"
  for config in ${configs}; do
    stop_instance ${config}
    sleep ${virtual_oss_delay}
  done
}

virtual_oss_status()
{
  pids=$(virtual_oss_pids)

  if [ "${pids}" ]; then
    echo "${name} is running as pid ${pids}."
  else
    echo "${name} is not running."
    return 1
  fi
}

run_rc_command $*